草原与草坪2026，Vol.46Issue(1)：9-18,10.DOI:10.13817/j.cnki.cyycp.2026.01.002
呼伦贝尔草原沙漠化对土壤碳氮磷及化学计量的影响
The impact of desertification on the carbon,nitrogen,phosphorus,and stoichiometry of the soil in the Hulunbuir grassland
摘要
Abstract
[Objective]To elucidate the impact of desertification on the carbon,nitrogen,and phosphorus(C,N,P)content and their stoichiometric characteristics in the soil of the Hulunbuir grassland,providing theoretical refer-ences and data support for the management and restoration of desertified areas in the Hulunbuir grassland.[Method]Soil samples were collected from depths of 0-10 cm and 10-20 cm in areas with varying degrees of desertification.One-way ANOVA,principal component analysis,and Pearson correlation analysis were employed to explore the changes in soil C,N,P content and stoichiometric ratios,and their relationships with soil physical and chemical proper-ties in different desertification zones.[Result]1)With increasing desertification,the overall content of soil C,N,and P and their stoichiometric ratios showed a decreasing trend,with the loss rates of soil C,N,and P content being in the order of C>N>P.The content of fine and medium soil particles also showed a decreasing trend,while the content of coarse particles increased significantly.However,changes in soil moisture content and the soil carbon-clay ratio were not significant.2)The soil pH value generally decreased with increasing desertification,but showed a slight in-crease in areas with very severe desertification.3)Except for pH,changes in soil C,N,P content,stoichiometric ra-tios,particle size,moisture content,and soil carbon-clay ratio were not significant between different soil layers.4)During desertification,changes in soil pH and medium particle size were the main driving factors affecting soil C,N,and P content,while changes in soil moisture content were secondary driving factors.[Conclusion]Desertification sig-nificantly affects the content and stoichiometric characteristics of soil C,N,and P.Compared with non-desertified land,desertified land shows a decreasing trend in soil C,N,and P content and stoichiometric ratios,primarily due to the reduction in fine and medium soil particles caused by desertification.However,desertification has no significant impact on soil moisture content and the carbon-clay ratio,but significantly affects soil pH.关键词
沙漠化/呼伦贝尔/土壤/碳氮磷/化学计量比/粒径Key words
desertification/HulunBuir/soil/carbon,nitrogen and phosphorus/stoichiometric ratio/particle size分类
农业科技引用本文复制引用
赖韶杰,那日苏,丽娜,银山,张钧惠,李明星,勿吉斯古冷..呼伦贝尔草原沙漠化对土壤碳氮磷及化学计量的影响[J].草原与草坪,2026,46(1):9-18,10.基金项目
内蒙古自治区高校科研重点项目(NJZZ23027) （NJZZ23027）
内蒙古师范大学基本科研业务费专项资金(2022JBYJ031) （2022JBYJ031）
内蒙古自然科学基金(2023QN04013) （2023QN04013）
一流学科科研专项项目(YLXKZX-NSD-039) （YLXKZX-NSD-039）
